TMZ reports that Reedus and Yeun were riding motorcycles in Georgia near the set of "The Walking Dead" when they happened upon a car accident. Though the injuries were minor, the pair reportedly stayed with the victims until the paramedics arrived.

When a terminally ill teenager's friends found out he had only a few days to live, they took to social media to invite rapper Eminem to meet the guy. Sure enough, the superstar went to the home of the boy, named Gage Garmo, for a surprise visit on January 11, 2015 and talked about hip-hop and football. Garmo died in his home the next day after succumbing to bone cancer.

When Cassidy Stay, the lone survivor of a shooting that killed her entire immediate family in Houston, needed encouragement, she looked no further than the words of Dumbledore from 'Harry Potter.' In turn, Rowling reached out to the little girl and sent a personalized letter, along with a wand and an acceptance letter to Hogwarts.

The singer is known for being a gentle heart, if not slightly lovelorn (okay, that last one is an understatement.) But her woeful lyrics took a backseat when one fan in a row boat paddled over to Swift to take a photo in New York City's Central Park. During their exchange, Swift learned it was the girl's birthday and that she was headed to Chipotle for some grub. That's when the superstar opened her purse and and handed the birthday girl $90 to cover their meals.

In 2007, the Texas-native singer donated a seven-passenger van to an orphanage in Mexico. The star reportedly won a Chrysler Crossfire sports car at the MTV Video Music Awards. She instead opted to trade it in for a Chrysler Town & Country so she could donate it to the orphanage.

According to a jewelry store employee, the 'Fast and Furious' star bought an engagement ring for an Iraqi vet's fiance...in secret. Walker reportedly did this after overhearing the couple discussing that the $10,000 was out of their price range. The news came out following the sudden death of the actor.

Sgt. Scott Moore took to YouTube to attempt something few non-Hollywood types have been successful at: to ask out Kunis. And guess what? It worked. The starlet made good on her word and accompanied the marine to his military ball in Greenville, North Carolina.

Before 'The Hangover' star made it big, he would frequent a laundromat where he befriended an elderly woman who survived off of tips. When he became famous, he obviously didn't visit the laundromat that often, but he would reportedly still check in on his friend. When he learned that she had become homeless, Galifianakis reportedly set the woman up with an apartment -- all bills paid. Word has it that Renee Zellweger helped the woman decorate her new pad. She's also been spotted on his arm on the red carpet.

The 'Matrix' actor reportedly gave tens of millions of dollars to the costume and special effects teams of the blockbuster films. What's more, he surprised each stuntman with their own Harley-Davidson motorcycle.

Together, Brangelina's humanitarian ways are probably enough to save the planet. Separately, Pitt still does some pretty selfless acts on his own. While filming 'World War Z' in 2012, Pitt made a donation of $1,100 --all the money he had on him at the time-- to people seeking donations for the Southampton Hospital's neonatal unit after he spotted the fundraisers asking the film crew for money.

In 2012, Creed's Scott Stapp said that T.I. rescued the singer he jumped from the balcony of a hotel's penthouse in a drug-induced state. The singer claims that the rapper found him and immediately took control of the situation. That's not his first time saving a life. In 2010, the rapper came across a man trying to jump from the top of a 22-story radio station. The rapper arrived on scene and recorded a message for the man, which the police delivered to the would-be jumper.

The 'Pirates of the Caribbean' star rescued his buddy, guitarist Stephen Jones, from a would-be mugger in Los Angeles. When Depp stood up to the man, the would-be thief allegedly said "I ain't stealing from Captain Jack." The actor then reportedly gave the man a few bucks and told him to straighten out his life.